Hysteresis Tensioning Brakes

Enhance Your Wire Spooling Drive Train

Increase longevity of your production line for wire spooling and winding operations with Sjogren's line of hysteresis tensioning and tensioning feedback brakes

Product Overview

Sjogren’s magnetic brakes for spooling and winding operations are key for any wire production facility. By helping control torque variations, tensioning brakes preserve drive train life in winding operations.

Utilizing magnetic resistance (hysteresis), Sjogren’s brakes operate without the need for an external power source and are designed with minimal mechanical wear components, aside from ball bearings.

The primary applications include: material unwind operations for payoff tasks; coil-wind operations ensuring constant tension with a nip roll; material handling for electric motor overload protection; and tightening operations for consistent cycling and tightening.

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Key Benefits

Discover the key features of the Hysteresis Brakes from Sjogren with our interactive model or scroll down to explore more about the options available, including tensioning feedback brakes and eddy-current clutches!

Jump to Brake Tech Specs and Model Options

1 Mechanical Assembly

Replacing bearings is made easy thanks to mechanical assembly rather than the usual welded assembly.

2 Consistency

The magnet-based technology maintains permanent, consistent levels of resistance and experiences no friction wear. Custom designs available as well as our standard lines, including eddy-current clutches.

3 Repeatability

Repeatable and recordable settings make it easy for the operator to control torque precisely with an integrated scale. This also allows your operators to reliably vary settings from one application to another.

4 Feed-back Tensioning Brake Options Available

Ensure optimal material tension during pay-off to minimize waste and extend the lifespan of your equipment. Sjogren’s Hysteresis Tensioning Feed-Back Brakes automatically adjust torque as the pay-off spool diameter decreases, enhancing both quality and efficiency. Sjogren proudly offers the market's largest permanent magnetic brake.

5 Constant Tension – No External Power Needed

The Sjogren hysteresis brakes are used to provide controlled tension or torque during spooling, unwinding, tightening or other similar machine operations.

The rugged brakes provide constant torque regardless of the rotation speed. They ensure smooth startup and uniform movements even as the diameters change. The brakes operate according to the principle of permanent magnetic dual disks hysteresis.

Units can be used for powertrain overload protection. This magnet technology does not require an external power supply and is virtually maintenance and wear-free.

Why Choose Sjogren's Hysteresis Brakes?

Enhance the life of your production line, smooth start up, and uniform movements with Sjogren's line of magnetic brakes for wire spooling, winding and tightening operations. Here are Four Common Applications:

1. Unwinding

Maintain constant tensions when winding or unwinding material

2. Coil-winding

Constant tension using a nip roll for coil winding operations

3. Overload Protection

Material handling operations for protecting electric motors from overload

4. Tightening Operations

Keep consistent tension for repetitive cycling and tightening operations

Industries and Applications

The Hysteresis Brakes and Clutch line from Sjogren is trusted by many industries that require consistency and reliable repeatability:

Energy Sector

For manufacturing reserve and motive power batteries, power equipment, and charging systems

Industrial & Construction Manufacturing

Steel wire production lines with payoff tension consistency required

Wire Processing & Wire Production

Consistent wire drawing, spooling and winding that reduces downtime on multiple line operations

Automotive

From spring coiling to fastener and clip manufacturing where consistency is key

Aerospace

From defense to unmanned aircraft manufacturing wire parts with constant tension in demanding settings

Energy Sector

For manufacturing reserve and motive power batteries, power equipment, and charging systems

Industrial & Construction Manufacturing

Steel wire production lines with payoff tension consistency required

Wire Processing & Wire Production

Consistent wire drawing, spooling and winding that reduces downtime on multiple line operations

Automotive

From spring coiling to fastener and clip manufacturing where consistency is key

Aerospace

From defense to unmanned aircraft manufacturing wire parts with constant tension in demanding settings

Sjogren's Hysteresis Brake & Feedback Brake Models and Specifications

View Tech Specs and Model Options Sjogren Magnetic Brakes

Model	Torque Range	Max. RPM at Min. Torque	Max. RPM at Max. Torque	Max. Moment on Shaft
SMB-0.75	.13lbs. – .75 in-lbs.	3,000 rev/min	1,350 rev/min	2 in – lbs.
SMB-1.25 M SMFB-1.25 M	0.6lbs. – 1.25 in-lbs. 0.6lbs. – 1.25 in-lbs.	2,000 rev/min 1,500 rev/min	800 rev/min 750 rev/min	40 in – lbs. 30 in – lbs.
SMB-12 M SMFB-12 M	1lbs. – 12 in-lbs. 1lbs. – 12 in-lbs.	1,000 rev/min 1,000 rev/min	175 rev/min 175 rev/min	80 in – lbs. 30 in – lbs.
SMB-25 M SMFB-25 M	2lbs. – 22 in-lbs. 2lbs. – 22 in-lbs.	1,000 rev/min 1,000 rev/min	250 rev/min 250 rev/min	200 in – lbs. 200 in – lbs.
SMB-60 M SMFB-60 M	5lbs. – 60 in-lbs. 5lbs. – 60 in-lbs.	1,000 rev/min 1,000 rev/min	200 rev/min 200 rev/min	1,000 in – lbs. 500 in – lbs.
SMB-120 M	10lbs. – 120 in-lbs.	1,000 rev/min	200 rev/min	1,000 in – lbs.

SMB= models without feedback control; SMFB= models with feedback control
Further specifications and measurements available upon request

Get Your Ideal Brake With the Application Data Sheet

Utilize this handy application data sheet to provide us your specifications and our team will be able to provide a recommendation with quote with ease

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Sjogren's Hysteresis Brake FAQ

Learn more from frequently asked questions and addressed common concerns about Sjogren's Brake line from others like you.

What brake sizes are best for material unwind operations?
Material Unwind Operations

Sizing Specifications
Full roll diameter (in.) (FD) = 6 in.
Core diameter (in.) (CD) = 4 in.
Average Tension (lbs.) (T) = 4 lbs.
Velocity (feet per min.) (V) = 100 fpm

Sizing Formula
Average radius (in.) = (FD+CD) / 4 = (6+4) / 4 = 2.5 in.
Torque (in. lb.) = (T) x Avg. Rad. = 4 x 2.5 = 10 in. lb.

Check Tension Range
Maximum Tension = Torque x 2 / CD (10×2 / 4) = 5 lbs.
Minimum Tension = Torque x 2 / FD (10×2 / 6) = 3.3 lbs.
Slip Watts = Max. Tens. x V / 44.2 (5×100 / 44.2) = 11.3 watts
Specify: Model SMB-12
Which brake sizes are best for material handling operations?
Material Unwind Operations

Motor Horsepower Method
Motor HP = 1/2 HP
Motor RPM = 1750 RPM

Sizing Formula
Torque (in. lb.) = HP x 63000 / RPM
1/2 x 63000 / 1750 = 18 in. lb.
Specify: Model SMB-60
Which brake size is best for tightening operations?
Tightening Operations

Sizing Specifications
Slip RPM = 500 RPM
Torque = 8 in. lbs.
% Slip Time of total cycle time = 25%

Sizing Formula
Watts = .0118 x Torque (in. lb.) x Slip RPM x % Slip Time
.0118 x 8 x 500 x .25 = 11.8 watts
Specify: Model SMB-60
Which brake size is best for coil wind operations?
Sizing Specifications
Pulley/Nip Roll dia. (in.) (D) = 6 in.
Tension (T) = 6 lbs.
Velocity (V) = 100 fpm

Sizing Formula
Torque (in. lb.) = TxD / 2 = (6×4) / 2 = 12 in. lb.
Slip Watts = TxV / 44.2 = (6×100) / 44.2 = 13.6 watts
Specify: Model SMB-12

If diameter is not predetermined, calculate slip watts and select a unit with a sufficient dissipation rating. Determine maximum diameter of pulley or nip roll using the following equation: Max. dia. (in.)=(12 in.lb.x2) / 6 lbs. = 4 in.
How much do Sjogren's magnetic brake offerings cost?
Sjogren stands out in the market with unparalleled quality. Our pricing is tailored to your specific production requirements.

The costs vary greatly depending on your specific needs and material costs at the time of purchase. We do offer volume pricing for almost any of our products. It is recommended to consider purchasing in quantity to realize this opportunity.

On average at the time of this question response, pricing ranges from the mid hundreds to under $5k depending on your specific model.

All Sjogren products are supplied with the Sjogren guarantee of quality and lifetime support for replacement parts, troubleshooting and re-ordering.

Get Your Magnetic Brakes Quote Started – Fast & Reliable Pricing And Delivery!

Tell us your wire processing needs, and our team will provide a tailored quote quickly. Get the best solution for consistent wire drawing today!

Hysteresis Tensioning Brakes

Product Overview

Key Benefits

Why Choose Sjogren's Hysteresis Brakes?

1. Unwinding

2. Coil-winding

3. Overload Protection

4. Tightening Operations

Industries and Applications

Sjogren's Hysteresis Brake & Feedback Brake Models and Specifications

View Tech Specs and Model Options Sjogren Magnetic Brakes

Get Your Ideal Brake With the Application Data Sheet

See some of our satisfied customers

Sjogren's Hysteresis Brake FAQ

What brake sizes are best for material unwind operations?

Material Unwind Operations

Which brake sizes are best for material handling operations?

Material Unwind Operations

Which brake size is best for tightening operations?

Tightening Operations

Which brake size is best for coil wind operations?

How much do Sjogren's magnetic brake offerings cost?

Get Your Magnetic Brakes Quote Started – Fast & Reliable Pricing And Delivery!